Clamping means for mounting printing plates



July 15, 1930. H. LEVISON 1,170,475

CLAMPING MEANS FOR MOUNTING PRINTING PLATES Filed Feb. l, 1928 FlIE L FIIE-E INVENTOR A TTORNE YS Patented July 15, 1930 PATENT orifice HARRY LEVSON, F SAN 4ETttAlWCSCO, CALIFORNIA CLAMPING MEANS non MoUNTiNG PRINTING PLATES Appiicatiori sied February 1, 192s.' sei-iai no. 251,029.

1 i My invention relates'pto clamps particularly designed for securing to either wooden, -composition or metallic kblocks unmounted printing-plates such as electrotypes, stereo-A types, half tones, 1 zinc etchings and other plates useful in printing and allied processes. i

clip used to clamp an unattached printing- Heretofore printing-plates have been either -permanently attached to their blocks or'if detached therefrom the means provided for l0 securing them to the blocksY has been rather complicated and very expensive. A printing-plate permanently secured to its block' is objectionable in that the space taken up by them in storing or shipping is excessive.' In general it is the object of my invention -toprovide a means whereby an unmounted printing-plate may be readily attached to either a Wooden, composition or metallic block Vand which means is very inexpensive. Another object of my invention is the provision of a clip provided with an inwardly extending` lip and an inwardly extending pro- -jection or teat in combination with argrooved or channelled block on which a printing-plate vis to be mounted. Y

Another object of my invention is the provision in combination with a chase, a: block and means for securing said bloclrwithin said chase, of meansoperated hy'said first mentioned means for simultaneously securing aV 'printing-'plate tol said block.v Another obj ect of my invention is the provision of a clamping means for printingplates such that the printing-plate may be 35. readily changed without disturbing the position ofthe surrounding furniture while the chase remains within the press. Y

My invention possesses other objectsand features of advantage, some of which, with 4 0r the foregoing, will be set forthin the following descriptionof my invention. It is'to be `understood that l do not limit'myself'to the showing made by the said description as I may adopt various forms of my invention within the scope of the claims.

Referring to the drawings:

Fig. 1 is a plan view of a chase, a printingplate and the clamping means by which. the block and printing-plate are simultaneously p 5o secured in position. s Y

Y'dection or teat 3 intermediate its ends. This Aclip is used in combination with a block t Y of leads. `on the bloclr 4 is placed thereon as shown in vupper tapered surfaces of the teats.

4 described.

Fig. 2 is a transverse section taken on the line 2 2' of Fig.v 1. e Y Fig. 3 is a fragmentary transverse section showing in detail the construction and operation of my clamping device. y 55 Fig. 4 is a detail perspective `view of thev plate to its block.

Fig. 5 is a fragmentary transverse section showing in detail a modification of my clampi ing device in operation.

My invention comprises a clip l provided at one of its ends with an inwardly extending lip 2 and with an inwardly extending pro- 65 which may be constructed either of wood or metal and is provided with laterally extending grooves, vchannels or indentations 5; VIf found desirable and as is well known to the trade this block .may be made in sections and brought to the proper dimensions by the use The printing-plate 6 to be mounted the various figures andwhen necessary may be brought to type height by means of shiins. In order to clamp the printing plate to the i block these members are placed within a chase 7 of any standard construction and several of the clips l are disposed along the sides 8g of theblock with the lips 2 overhanging the beveled edges of the printing-plate and with the projection or teats 3 extending into the grooves or channels of the blocl, as shown in Figs. 2 and 3. It is to be noted that the ceng5 ter line of the teats is slightly above the center line of the grooves or channels 5, and that the teats and grooves or channels are so positioned that the outer edge of the roof of the grooveswill always be in Contact with the r This particular relation of parts results in a cer tain clamping or wedging action to be later The bloclr e is then clamped or secured in the chase 7 or other form retaining means by the use of suitable standard furniture 8 and by pairs'o'f key operated wedges or quoins 9 `or other suitable clamping means.

"The wedging laction produced by the wedges `by' the u pexendicular to the plane of said clips,there from-said lip and adapted torengage said Y by o rcingfthe clips toward the block 4. By

so moving the cli s 1 toward the block 4, Ythe upper surfaces o the teu-ts 3 are made to enthe roof of the channels or grooves 5 and due to the inclined surfaces of the teats, a vertical component of the lateral thrust is roduCL This urges or wedges the clips 1 downwardly as well as inwardly, causing the lips 2 to engage the beveled edges of the printing-plate 6 and thereby clamping the print- Y ing-plate 6 and the block 4 together. .The wedgin action produced by the chps is of course ls entirely to that portion of it lyinv above the center line of the tents.

y tea-ts 3 may of course be replaced by laterally extending tapered prdjiectionsa'nd the oove 5 may extend either the full length of tgz 'blockfi or may be merely long enough to accommodate the teats 3.-

\ i The clips l, as is shown in Fig. may be i 'ded with extending lips 11 at `both of ,its ends, which, in this instance, extend iniwurdly, one to engage the beveled edges o the printing-plate and the other to replace the beats as described above and to engage the mater` edge o'f the roeic of the channels or grooveswithin the block. The angles made by the lower lig or by the upper surface of the teats witht e normal to the clip is preferibly less thalril the corresponding angle made L From t e abgve disclosure itwill be noted that l have provided a simple construction `where a Yri-nting-platemay be secured to a block ldiiaul) taneously with and by the same operation by which the block is positioned within the chase. `A plurality of printingplates may be set u within a single chase and each or any one o them. may be easily and zickly changed without taking the chase m the press and without disturbing the surrounding furniture thereby effecting a considerable saving in time. The apparatus required is all standard with the exception aithe block and clips used which are very readily and economically manufactured, and the time of makeready is materially decreasedt These two factors, economy of time and economy of materials required for make ready make it possible to handle printingplates unmounted, thereby eecting a material saving in storing and shippin costs.

R is to be understood that y the use di the word chase I intend to include those other means which are useful in retaining a form in ition for printing and which are not artlcularly designated as chases but `wllie perform substantially the functions tliemof: lI claim: Y

1. Amanew articleof manufacture' for use in. clmping printing-plates to a block, a clip provided with an inwardly extending lip and am inwardly extending projection spaced block.

2. As a new article of manufacture for use in clamping printing-plates to a block a clip provided with an inwardly extending lip at one of its ends and a taperedinwardly extending projection disposed below said lip.

3. As a new article of manufacture for use in clamping printing-plates to a block, a clip provided with an inwardly extending lip at one of its en'ds and an inwardly extending teat disposed below said lip.

4. Ask a new article of manufacture for use in clamping rinting-plates to a block, a clip provided wit an inwardly extending lip at one-of its ends and inwardly' extending teat intermediate its ends.

5. In combination with a block for detachably mounting printing-platea-a clip provided with an linwardly extending lipY for engaging the tapered edges of a printingplate below the printing plane, and means v on said clip for positively securing said plate 4plate against said block when said clip is moved in a direction perpendicular to its own plane and parallel to the plane of the printing plate.

8.` In combination with a block for detachaby mounting printing-plates, a clip provi ed with-means for engagingthe edge of a printing-plate and means for preing said printing-plate against said block when said clip is moved in a direction substantially parallel to the plane of the printing plate` 9. In combination with a channeled block for detachably positioning unmounted printing-plates, a clip provided with means for engaging the edge of a printing-plate and means cooperating with the channels of. said block for .pressing said printing-plate against said block when theicli-p is moved in a direction perpendicular to its own plane.`

10. In combination with a block provided ,with lateral indentations, a plurality of clips provided with inwardly extending lips and inwardlyextending tapered projections, the centerline of said projections being normally disposed above the center line of Vsaid indentations. i

511. In combination with a chase, furniture and ablock provided withla laterali disposed groove, a plurality of clips each provided with an inwardly extending printing-plate-engaging-lip and an inwardly extending teat, said teat being adapted tol engage the roof of said groove so that a thrust on said clips normal to their plane produces a vertical component tending to press said block and plate together.

l2. In combination with a chase, a block and means for securing said block vwithin said chase, means operated by said first mentioned means for simultaneously securing a printing-plate positively to said block.

13. In combination with a chase, a block i and furniture, means whereby a printing plate may be positively secured to said block simultaneously with and by the same operation by which the block is secured Within said chase.

14. In combination lwith a chase, avblock, furniture and clamping means, meanswhereby the engaging faces of a printing-plate and the block are positively pressed together by the same operation by which said block is secured within the chase.

l5. In combination with a block for detacliably mounting printing plates, a clip provided with means for engaging the edge of a printing plate substantially below the printing plane, and other means on said clip for positively securing said plate to said block upon substantially a movement of said clip parallel to said printing plane.

In testimony whereof, I have hereunto set my hand.

HARRY LEVISON. 

